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// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "vm/object.h"
#include "vm/regexp_assembler.h"
namespace dart {
class BytecodeRegExpMacroAssembler : public RegExpMacroAssembler {
// Create an assembler. Instructions and relocation information are emitted
// into a buffer, with the instructions starting from the beginning and the
// relocation information starting from the end of the buffer. See CodeDesc
// for a detailed comment on the layout (globals.h).
// If the provided buffer is NULL, the assembler allocates and grows its own
// buffer, and buffer_size determines the initial buffer size. The buffer is
// owned by the assembler and deallocated upon destruction of the assembler.
// If the provided buffer is not NULL, the assembler uses the provided buffer
// for code generation and assumes its size to be buffer_size. If the buffer
// is too small, a fatal error occurs. No deallocation of the buffer is done
// upon destruction of the assembler.
BytecodeRegExpMacroAssembler(ZoneGrowableArray<uint8_t>* buffer, Zone* zone);
virtual ~BytecodeRegExpMacroAssembler();
// The byte-code interpreter checks on each push anyway.
virtual intptr_t stack_limit_slack() { return 1; }
virtual bool CanReadUnaligned() { return false; }
virtual void BindBlock(BlockLabel* label);
virtual void AdvanceCurrentPosition(intptr_t by); // Signed cp change.
virtual void PopCurrentPosition();
virtual void PushCurrentPosition();
virtual void Backtrack();
virtual void GoTo(BlockLabel* label);
virtual void PushBacktrack(BlockLabel* label);
virtual bool Succeed();
virtual void Fail();
virtual void PopRegister(intptr_t register_index);
virtual void PushRegister(intptr_t register_index);
virtual void AdvanceRegister(intptr_t reg, intptr_t by); // r[reg] += by.
virtual void SetCurrentPositionFromEnd(intptr_t by);
virtual void SetRegister(intptr_t register_index, intptr_t to);
virtual void WriteCurrentPositionToRegister(intptr_t reg, intptr_t cp_offset);
virtual void ClearRegisters(intptr_t reg_from, intptr_t reg_to);
virtual void ReadCurrentPositionFromRegister(intptr_t reg);
virtual void WriteStackPointerToRegister(intptr_t reg);
virtual void ReadStackPointerFromRegister(intptr_t reg);
virtual void LoadCurrentCharacter(intptr_t cp_offset,
BlockLabel* on_end_of_input,
bool check_bounds = true,
intptr_t characters = 1);
virtual void CheckCharacter(unsigned c, BlockLabel* on_equal);
virtual void CheckCharacterAfterAnd(unsigned c,
unsigned mask,
BlockLabel* on_equal);
virtual void CheckCharacterGT(uint16_t limit, BlockLabel* on_greater);
virtual void CheckCharacterLT(uint16_t limit, BlockLabel* on_less);
virtual void CheckGreedyLoop(BlockLabel* on_tos_equals_current_position);
virtual void CheckAtStart(BlockLabel* on_at_start);
virtual void CheckNotAtStart(intptr_t cp_offset, BlockLabel* on_not_at_start);
virtual void CheckNotCharacter(unsigned c, BlockLabel* on_not_equal);
virtual void CheckNotCharacterAfterAnd(unsigned c,
unsigned mask,
BlockLabel* on_not_equal);
virtual void CheckNotCharacterAfterMinusAnd(uint16_t c,
uint16_t minus,
uint16_t mask,
BlockLabel* on_not_equal);
virtual void CheckCharacterInRange(uint16_t from,
uint16_t to,
BlockLabel* on_in_range);
virtual void CheckCharacterNotInRange(uint16_t from,
uint16_t to,
BlockLabel* on_not_in_range);
virtual void CheckBitInTable(const TypedData& table, BlockLabel* on_bit_set);
virtual void CheckNotBackReference(intptr_t start_reg,
bool read_backward,
BlockLabel* on_no_match);
virtual void CheckNotBackReferenceIgnoreCase(intptr_t start_reg,
bool read_backward,
bool unicode,
BlockLabel* on_no_match);
virtual void IfRegisterLT(intptr_t register_index,
intptr_t comparand,
BlockLabel* if_lt);
virtual void IfRegisterGE(intptr_t register_index,
intptr_t comparand,
BlockLabel* if_ge);
virtual void IfRegisterEqPos(intptr_t register_index, BlockLabel* if_eq);
virtual IrregexpImplementation Implementation();
// virtual Handle<HeapObject> GetCode(Handle<String> source);
RawTypedData* GetBytecode();
// New
virtual bool IsClosed() const {
// Added by Dart for the IR version. Bytecode version should never need an
// extra goto.
return true;
virtual void Print(const char* str) { UNIMPLEMENTED(); }
virtual void PrintBlocks() { UNIMPLEMENTED(); }
static RawInstance* Interpret(const RegExp& regexp,
const String& str,
const Smi& start_index,
bool is_sticky,
Zone* zone);
void Expand();
// Code and bitmap emission.
inline void EmitOrLink(BlockLabel* label);
inline void Emit32(uint32_t x);
inline void Emit16(uint32_t x);
inline void Emit8(uint32_t x);
inline void Emit(uint32_t bc, uint32_t arg);
// Bytecode buffer.
intptr_t length();
// The buffer into which code and relocation info are generated.
ZoneGrowableArray<uint8_t>* buffer_;
// The program counter.
intptr_t pc_;
BlockLabel backtrack_;
intptr_t advance_current_start_;
intptr_t advance_current_offset_;
intptr_t advance_current_end_;
static const int kInvalidPC = -1;
} // namespace dart